YES, this is happening to me, too. However I have not lost a lot of weight yet. I'm seriously sitting at work almost hypervenilating over something small. I think it's cortisol, and if you have very low or non-existant progesterone (i.e., if your periods are irregular or you don't have one at all), then nothing in your body is keeping cortisol in check. I've been bad about keeping up with my progesterone cream, so I'm feeling everything pile up inside me. It's terrible... it's affecting my work, too. I want to tell my boss or HR that's it's all hormones but really how does one even get into that subject...
Anyway, I'm thinking of seeing a doctor to sort it all out.